EP0381980A1 - Device for the fixation and through-put cables, conduits, tubes or hoses - Google Patents

Abstract

The invention relates to a device for holding and ducting cables, lines, tubes or hoses, having a screw sleeve which has clamping fingers (5) in the axial projection of the thread region which are separated from one another by axial slots (6) and are arranged, preferably as one piece, on the screw sleeve, and having a clamping nut with an insertion opening, which, in its interior, has a tapering, preferably conical compression surface for acting on the ends of the clamping fingers and for radially deforming them, and a rotation securing device for latching with one or more of the clamping fingers. In order to achieve security against rotating loose, which is as good as possible and is also, for example, secure against vibration, of the clamping nut (7) which is screwed onto the screw sleeve (1), and in order to be able to match said clamping nut (7) in practice to all requirements occurring in production, it is proposed according to the invention that at least one latching tooth (11) be provided as a rotation securing device in the interior of the clamping nut, which latching tooth projects over the compression surface and has a locking edge for latching in between two clamping fingers which are separated from one another by axial slots of oblique cross-section, that this locking edge be arranged obliquely with respect to a radius of the insertion opening running in the region of the said locking edge and hence intersecting it, and that said locking edge, in the in-use position, runs obliquely with respect to the same rotation or circumferential direction as the axial slots of the screw sleeve. A development according to the invention, of significance which is worthy of protection in its own right, provides that at least one latching groove, having a locking edge for latching in a clamping finger, be provided on the compression surface in the interior of the clamping nut as a rotation securing device. …<IMAGE>…

Description

The invention relates to a device for holding and for passing cables, lines, pipes or hoses, with a screw sleeve, which in the axial continuation of the thread area has clamping fingers separated from one another by axial slots, which are preferably arranged in one piece on the screw sleeve, and with a union nut Push-through opening which has in its interior a tapered, preferably conical pressure surface for acting on the ends of the clamping fingers and for their radial deformation, as well as a rotation lock for locking with one or more of the clamping fingers.

Such a screw connection is already known from DE-PS 26 31 996 and is used, for example, as a cable screw connection for vibration-resistant installation of cables in devices, machines, assemblies or the like.
For example, a cable is passed through the screw sleeve and the push-through opening of the union nut and by tightening the union nut on the screw sleeve with the help of the clamping fingers which are pressed approximately radially inwards its location fixed. During the screwing of the union nut onto the screw sleeve, several latching teeth, which are arranged obliquely in the axial longitudinal section of the device with their tooth base and serve as helical teeth or anti-rotation, deflect the individual clamping fingers in such a way that the tooth flanks or locking flanks of the latching teeth, which are effective for latching, move their place between them find the pinch fingers.

In this known device, the effective tooth flank is aligned exactly radially to the push-through opening of the union nut, as is similarly also customary for the locking teeth of locking tooth screws and locking tooth nuts. However, since the cross-section of the slots between the clamping fingers is arranged at an angle, there is only one point contact when screwing the union nut onto the screw sleeve between the clamping fingers and the locking teeth, and thus a relatively inadequate latching, which often affects them with only a comparatively small amount Forces can be disengaged again.

There is therefore the task of creating a device of the type mentioned, which not only leads to a possibly unintentionally easily releasable locking of the cable gland or the like, but in which the lock between its union nut and the screw sleeve already during manufacture can be adapted to the respective requirements and loads and can be selected accordingly. The design and manufacturing effort for the individual parts of the device should be as little as possible or not significantly greater.

The solution to this problem according to the invention in the device of the type mentioned in particular consists in the fact that little inside the union nut to prevent rotation Mostly a locking tooth is provided which protrudes over the pressure surface and has a locking flank for snapping between two clamping fingers separated by cross-sectional axial slots, that this locking flank is arranged obliquely to a radius in its area and thus intersecting it, and that in the position of use, it runs obliquely to the same direction of rotation or circumference as the axial slots of the screw sleeve. This, also in the cross section of the device, oblique arrangement of the locking flanks of the locking teeth ensures that after the screwing has been carried out, the locking flank of a locking tooth over its length largely comes into operative connection and comes into contact with the respective engagement finger of the screw sleeve and thus a real and effective locking against causes a release movement.

Another advantageous development of the device mentioned at the outset, for which independent protection is claimed, provides according to the invention that at least one locking groove with a locking flank for locking a clamping finger is provided on the pressure surface inside the union nut as a rotation lock. Such an embodiment, which has radial or inclined locking grooves instead of locking teeth, can be produced easily and with little effort.

It is advantageous if the axial slots separating the clamping fingers also run obliquely here, if the locking flank of each latching groove is arranged obliquely to a radius of the push-through opening that runs in its area and thus intersects it, and if it is in the position of use in the same rotational or circumferential direction towards how the axial slots of the screw sleeve run obliquely. This embodiment of the device according to the invention also allows a good and also preselected during manufacture bare lock or anti-rotation lock between the union nut and screw sleeve.
When the union nut is screwed on, individual clamping fingers of the screw sleeve, which are separated from one another by oblique axial slots, are pressed outwards and can therefore easily engage in a corresponding locking groove.

A firm securing of the screw connection of the screw sleeve with the union nut screwed onto it can be achieved if the axial slots of the screw sleeve and the locking flanks of the locking teeth or locking grooves provided on the union nut each have approximately the same angle of inclination in relation to the radius of the through opening that intersects them. If, for example, the cross-sections of the axial slots between the clamping fingers and the locking flanks of the locking teeth provided on the union nut each have approximately the same angle of inclination in relation to the intersecting radius of the push-through opening, the locking flank comes into active connection with the clamping finger that it engages practically over the entire length. In the case of an embodiment which has one or more rest grooves instead of locking teeth, each locking flank also has the same angle of inclination as the narrow edge edge regions of the clamping fingers which delimit the axial slots. Correspondingly, the clamping fingers can snap into the locking grooves with this edge area when the union nut is screwed onto the screw sleeve.

Depending on whether the union nut may have to be unscrewed from the screw sleeve frequently, it is advantageous if the lock between the union nut and the screw sleeve can be adapted to these requirements during manufacture.

For this purpose, the acute angle enclosed by the locking flank and the radius intersecting it at its inner radial end deviates from the acute angle which the axial slots and the radii also intersect at their inner radial edge regions in the case of undeformed clamping fingers.

According to a further, particularly advantageous proposal according to the invention, the acute angle enclosed by the locking flank and the radius intersecting it at its inner radial end is preferably somewhat larger than that by the axial slots and the radius also intersecting each of these at its inner radial end regions acute angle with undeformed clamping fingers.
Through the operative connection of, for example, the locking tooth with the clamping finger which it engages behind, the latter is deformed under the pressure of the locking tooth in the circumferential or rotational direction, that is to say it is inclined. If the inclination of the angle of the locking flank is somewhat stronger than that of the undeformed clamping finger, the full operative connection between the locking flank and the clamping finger engaged by it occurs precisely even when the screw connection is subjected to increased stress, in order then to be advantageous in the sense of a strong locking impact.

If for some reason (e.g. frequent dismantling) a weaker locking is desired, it is advisable if the angle enclosed by the locking flank and the radius intersecting it at its inner radial end is preferably somewhat smaller than that of the axial slots and the angles that these radii also intersect at their inner radial end regions in the case of undeformed clamping fingers.

Due to the slightly weaker design of the angle, a correspondingly weaker blocking can be achieved at the same time.

A plurality of locking teeth or locking grooves are expediently provided.
An important embodiment according to the invention provides that the locking flanks of the locking teeth or locking grooves preferably enclose different angles with the radius intersecting at their inner radial end. Thus, at least one of these locking teeth can attack the clamping fingers as best as possible depending on the deformation of the clamping fingers.

It is advantageous if the height of the locking flank changes over its length, so that an adaptation to the radial deformation and also to the outer contour of the clamping fingers is possible. Since the clamping fingers are generally radially deformed inwards, it is advantageous if the height of the locking flank of a locking tooth or a locking groove increases from the larger to the smaller diameter of the pressure surface.

Another advantageous embodiment according to the invention provides that the locking flank of the locking teeth has an undercut from the tooth tip to the tooth base. As a result, it can literally claw and positively connect to the detected clamping finger under load and thus even better prevent a radial evasion movement of this clamping finger from the area of the locking tooth.

In order to largely avoid damage to the clamping finger edges when the blocking is opened several times, it is expedient if the blocking flank and the opposite one The tooth flank of each locking tooth converges from the tooth base to the tooth tip. With a corresponding height of the locking teeth, a good locking between the screw sleeve and the screwed nut on it can still be achieved. Due to the opposing, positive beveling of the tooth flanks from the tooth tip to the tooth base, damage to the clamping finger edges is largely avoided even after repeated disassembly of the device according to the invention.
With a corresponding design of the locking grooves, the advantages mentioned can also be achieved in such embodiments.

In order to ensure that the device according to the invention functions as well as possible with comparatively little production effort, it is expedient if the screw sleeve and / or the union nut consist essentially of an elastic material, in particular of plastic.

Further developments of the invention are listed in further subclaims. In the following we will explain them in more detail using advantageous exemplary embodiments in conjunction with the figures.

• Fig. 1 eine, zu einer Kabel- oder dgl. Verschraubung gehörende Schraubhülse in einem axialen Längs­schnitt,
• Fig. 2 die Schraubhülse aus Fig. 1 in einer Draufsicht auf ihre Klemmfinger,
• Fig. 3 eine auf die Schraubhülse aus Fig. 1 und 2 auf­ schraubbare Überwurfmutter mit Durchstecköffnung, ebenfalls in einem axialen Längsschnitt,
• Fig. 4 die Überwurfmutter aus Fig. 3 in einer Draufsicht in Blickrichtung "X" aus Fig. 3,
• Fig. 5 die Überwurfmutter aus Fig. 3 und 4 im Bereich eines ihrer Rastzähne in einem Teil-Querschnitt in Schnittebene A-A aus Fig. 4,
• Fig. 6 in einem Teil-Querschnitt den Rastzahn einer gegenüber Fig. 5 geringfügig abgewandelten Über­wurfmutter ,wobei die Sperrflanke und die gegen­überliegende Zahnflanke des Rastzahnes von der Zahnbasis zur Zahnspitze hin aufeinander zulaufen,
• Fig. 7 in einem Teil-Querschnitt eine entsprechend dem Rastzahn in Fig. 5 ausgebildete Rastrille, deren Sperrflanke ebenfalls eine Hinterschneidung bildet und
• Fig. 8 eine entsprechend dem Rastzahn in Fig. 6 ausge­bildete Rastrille in einem Teil-Querschnitt, wobei die Sperrflanke und die gegenüberliegende Flanke dieser Rastrille von ihren außenseitigen Längs­rändern zum Rillengrund hin aufeinander zulaufen.

It shows:

• 1 is a screw sleeve belonging to a cable or similar screw connection in an axial longitudinal section,
• 2 shows the screw sleeve from FIG. 1 in a top view of its clamping fingers,
• Fig. 3 on the screw sleeve of Fig. 1 and 2 screwable union nut with push-through opening, also in an axial longitudinal section,
• FIG. 4 shows the union nut from FIG. 3 in a top view in the viewing direction "X" from FIG. 3,
• 5 shows the union nut from FIGS. 3 and 4 in the area of one of its locking teeth in a partial cross-section in section plane AA from FIG. 4,
• 6 is a partial cross-section of the locking tooth of a union nut which is slightly modified compared to FIG. 5, the locking flank and the opposite tooth flank of the locking tooth running towards one another from the tooth base to the tooth tip,
• Fig. 7 in a partial cross-section, a locking groove formed corresponding to the locking tooth in Fig. 5, the locking flank of which also forms an undercut and
• Fig. 8 is a locking groove formed in accordance with the locking tooth in Fig. 6 in a partial cross-section, wherein the locking flank and the opposite flank of this locking groove run towards each other from their outer longitudinal edges to the groove base.

Fig. 1 shows a hollow cylindrical screw sleeve 1 of a device - not shown here - for holding and guiding cables, lines, pipes or hoses in an axial longitudinal section.
The screw sleeve 1 can be used with a connecting thread 2 up to a hexagon collar 3 in a corresponding recess, for example of a device or a machine. On the side of the hexagon opposite the connecting thread 2 Federal 3, the screw sleeve 1 has a receiving thread 4 and in the axial continuation of the receiving thread 4 on the front side a plurality of clamping fingers 5 which are separated from one another by cross-sectional axial slots 6 as shown in FIG. 2. The clamping fingers 5 are integrally connected to the screw sleeve 1 made of hard elastic plastic. Due to the oblique arrangement of the axial slots 6 separating them from one another, the clamping fingers 5 can rest well against one another in the event of radial deformation inwards.

A union nut 7, shown in FIGS. 3 and 4, with a push-through opening 8 can be screwed onto the receiving thread 4 of the screw sleeve 1. The union nut 7 is shaped like a cap nut and has in its interior a tapered and here conical pressure surface 9 with which it acts on the free end regions 10 of the clamping fingers 5 when screwed onto the screw sleeve 1 and increasingly deformed radially inward.

The device consisting essentially of the screw sleeve 1 and the union nut 7 can be used, for example, as a cable gland for vibration-proof installation of cables in devices, machines, assemblies or the like. be used.

For example, a cable, a hose or the like. passed through the screw sleeve 1 and the push-through opening 8 of the union nut 7, the clamping fingers 5 move when screwing the union nut 7 onto the screw sleeve 1 against this cable, this hose or the like. and fix this object there in its position. This can also relieve a cable of unintentional, excessive tension.

To prevent rotation of the union nut 7 connected to the screw sleeve 1, the union nut 7 points against its pressure surface 9 Above the pressure surface 9 at least one protruding locking tooth 11 with a locking flank 12, the locking tooth being able to be snapped between two clamping fingers 5 when the union nut 7 is screwed onto the screw sleeve 1. But it is also possible that the union nut 7 on its pressure surface 9 instead of a locking tooth 11 has at least one locking groove 17, 17 'located opposite the pressure surface 9 (see FIGS. 7, 8) into which a clamping finger can be locked with its edge region.

In order to enable a real locking of the union nut 7 screwed onto the screw sleeve 1 with its internal thread 16, the invention provides that the locking flank 12 - as in FIGS. 4 is clearly recognizable - obliquely to a radius 13 of the push-through opening 8 which runs in its area and thus intersects it. Comparing, for example, the screw sleeve 1 shown in FIG. 2 with the union nut 7 shown in FIG. 4, it becomes clear that the locking flanks 12 of the locking teeth 11 in the use position of the device extend obliquely to the same circumferential direction as the axial slots 6 of the screw sleeve 1. The locking flanks 12 of the locking teeth 11 are expediently inclined with respect to the radius at approximately the same angle as the cross section of the axial slots 6 provided between the clamping fingers 5. In this way, after the union nut 7 has been screwed onto the screw sleeve 1, the locking flanks 12 of the locking teeth 11 each come into operative connection and contact with the clamping fingers 5 they engage, practically over their entire length, and thus prevent a real and effective locking against cause a release movement.

The locking flanks 12 can, however, also be arranged on the pressure surface 9 of the union nut 7 in such a way that the inclination of the angle of one of the locking flanks 12 is somewhat greater than that of the undeformed clamping finger 5 or the axial slots 6 provided between the clamping fingers 5. Since the clamping finger 5 when trying to open the device under the pressure of the locking tooth 11 is deformed in the circumferential direction, that is to say inclined, in this embodiment the full operative connection and effectiveness of the anti-rotation lock is advantageously achieved precisely when there is an increased load.

In Fig. 4 it is indicated that a plurality of locking teeth 11 with locking flanks 12 can also be provided on the pressure surface 9. In the case of a plurality of locking teeth 11, it may be expedient to design their angular positions differently, so that at least one of the locking flanks 12 can attack the clamping fingers 5 as best as possible, depending on the load and deformation.

From the partial longitudinal section shown in Fig. 3 it is clear that the height of the locking flanks 12 changes over their length and increases from the larger to the smaller diameter of the pressure surface 9. Thus, the locking flanks 12 are largely adapted to the radial and inward deformation of the clamping fingers 5 and to their outer contour.

5 shows the union nut 7 from FIGS. 3 and 4 in the region of one of its locking teeth 11 in a partial cross section in the sectional plane AA from FIG. As shown in FIG. 5, the locking teeth 11 are approximately sawtooth-shaped in cross-section with a tooth flank 14 that is flatter compared to the pressure surface 9 and the locking flank 12 that is steeper in comparison. The tooth tip is flattened and runs approximately parallel to the pressure surface 9. On closer inspection it becomes clear that that the locking flank 12 has an undercut from the tooth tip 15 to the tooth base, through which it can claw and connect positively under load with the clamping finger 5 it detects and form-fit, thereby causing a radial evasive movement of this clamping finger 5 out of the area of the corresponding locking tooth 11 is prevented even better.

In Fig. 6 is shown in a partial cross-section in relation to the pressure surface 9 projecting locking tooth 11 ', the locking flank 12 and the locking flank 12 opposite tooth flank 14 converge towards each other from the tooth base to the tooth tip 15. In this embodiment, damage to the clamping finger edges delimiting the axial slots 6 is largely avoided even if the union nut 7 screwed onto the screw sleeve 1 and its rotation lock are opened several times. By appropriate design of the helix angle and / or by a larger height compared to the locking tooth shown in Fig. 5 from the tooth base to the tooth tip of the locking tooth 11 'can still achieve good locking between the union nut and screw sleeve in this embodiment.
As shown in Fig. 6, the tooth flank 14 of the locking tooth 11 'is beveled flat against the locking flank 12.

The features and the advantages associated with the features of the locking teeth 11, 11 'can be analogously largely transferred to such locking grooves, which serve as a rotation lock for locking the edge areas of the clamping fingers 5 of a screw sleeve 1 and lie opposite the pressure surface 9 of the union nut 7.
In Fig. 7, a locking groove 17 is shown in a partial cross section, which serves as a rotation lock for locking a clamping finger 5 of the screw sleeve 1 and is located opposite the pressure surface 9. The locking groove 17 in FIG. 7 is designed analogously to the locking tooth 11 shown in FIG. 5. 7 shows that the locking flank 18 of the locking groove 17 forms an undercut from its outer longitudinal edge 19 to the groove base 20. The flank 21 opposite the locking flank 18 is beveled somewhat flatter towards the locking flank 18.

In Fig. 8 is a locking groove 17 'in a partial cross section shown, the flanks - similar to the locking flank and the tooth flank of the locking tooth 11 'shown in Fig. 6 - from their outer longitudinal edges 19 to the groove base 20 towards each other. Even with the help of the locking groove 17 ', the locking between the screw sleeve 1 and the screwed onto it union nut 7 can be loosened and opened several times, practically without damaging the edge areas of the clamping fingers 5 which snap into the locking groove 17' a higher tooth height achievable locking reduced by the positive slope of the locking edge 18 and the opposite edge 21.

Through the inventive design of the locking teeth 11, 11 'or the locking grooves 17, 17' and their locking flanks 12 and 18, a device can be created, with the help of which - if necessary - practically a real and also effective against a large force blocking its union nut 7 connected to the screw sleeve 1 is possible against a loosening movement.
At the same time, however, it is also possible to use the shape and height of the locking teeth or locking grooves to produce a locking device that can be adapted to practically all requirements during manufacture.

All of the individual features described above or listed in the claims can be essential to the invention individually or in any combination with one another.

Claims (16)

1. Device for holding and for passing cables, lines, pipes or hoses, with a screw sleeve (1), which in axial continuation of the threaded area (4) by axial slots (6) has separate clamping fingers (5), which preferably in one piece the screw sleeve (1) are arranged, and with a union nut (7) with a push-through opening (8), which has a tapering, preferably conical pressure surface (9) in its interior for acting on the ends of the clamping fingers (5) and for their radial deformation as well has a rotation lock for locking with one or more of the clamping fingers (5), characterized in that at least one locking tooth (11, 11 ') is provided in the inside of the union nut (7) as a rotation lock, which protrudes beyond the pressure surface (9) and one Locking flank (12) for snapping between two clamping fingers (5) separated from one another by axial slits (6) with a cross section that this locking flank (12) obliquely to egg NEM extending in their area and thus intersecting radius (13) of the push-through opening (8) is arranged, and that in the position of use to the same direction of rotation or circumference as the axial slots (6) of the screw sleeve (1) extends obliquely. 2. Device according to the preamble of claim 1, characterized in that on the pressure surface (9) inside the union nut (7) as a rotation lock at least one locking groove (17, 17 ') with a locking flank (18) for latching a clamping finger (5 ) is provided. 3. Apparatus according to claim 2, characterized in that the clamping fingers (5) separating axial slots run obliquely, that the locking flank (18) of each locking groove (17, 17 ') obliquely to a in its area and thus cutting radius of the Push-through opening is arranged, and that it (18) extends obliquely in the position of use in the same direction of rotation or circumferential direction as the axial slots (6) of the screw sleeve (1). 4. Device according to one or more of claims 1 to 3, characterized in that the axial slots (6) of the screw sleeve (1) and the locking flanks (12, 18) of the locking teeth (11, 11 ') provided on the union nut (7) or locking grooves (17, 17 ') in the position of use each have approximately the same angle of inclination with respect to the intersecting radius of the push-through opening (8). 5. The device according to one or more of claims 1 to 4, characterized in that the acute angle enclosed by the locking flank (12, 18) and the radius intersecting it at its inner radial end deviates from the acute angle which the axial slots (6 ) and also enclose the radii that intersect at their inner radial end regions in the case of undeformed clamping fingers (5). 6. The device according to claim 5, characterized in that of the locking flank (12, 18) and which they on their the inner radial end intersecting radius is preferably slightly larger than the angle of the axial slots (6) and the radii also intersecting at their inner radial end regions with undeformed clamping fingers (5). 7. The device according to claim 5, characterized in that the included by the locking flank (12, 18) and the intersecting at its inner radial end radius is preferably slightly smaller than that of the axial slots (6) and these also each Radii intersecting their inner radial end regions included angles with undeformed clamping fingers (5). 8. The device according to one or more of claims 1 to 7, characterized in that a plurality of locking teeth (11, 11 ') or locking grooves (17, 17') are provided. 9. The device according to claim 8, characterized in that the locking flanks (12, 18) of the locking teeth (11, 11 ') or locking grooves (17, 17') with which they preferably include different angles at their inner radial end intersecting radius. 10. The device according to one or more of claims 1 to 9, characterized in that the height of the locking flank (12, 18) changes over its length. 11. The device according to one or more of claims 1 to 10, characterized in that the height of the locking flank (12, 18) increases from the larger to the smaller diameter of the pressure surface (9). 12. The device according to one or more of claims 1 to 11, characterized in that the locking flank (12) of the locking teeth (11) from the tooth tip (15) to the tooth base has an undercut. 13. The device according to one or more of claims 1 to 11, characterized in that the locking flank (12) and the opposite tooth flank (14) of each locking tooth (11 ') from the tooth base to the tooth tip (15) converge towards each other. 14. The device according to one or more of claims 1 to 13, characterized in that the locking flank (18) of the locking grooves (17) from its outer longitudinal edge (19) to the groove base (20) forms an undercut. 15. The device according to one or more of claims 1 to 13, characterized in that the locking flank (18) and the opposite flank (21) of each locking groove (17 ') from their outer longitudinal edges (19) to the groove base (20) towards each other . 16. The device according to one or more of claims 1 to 15, characterized in that the screw sleeve (1) and / or the union nut (7) consist essentially of an elastic material, in particular plastic.

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